SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier d3
    Identifier f2
    Function least (children 1)
     ExpressionList (children 2)
      Identifier d3
      Identifier f2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier f2
